Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Beyond the annotations, the description reveals that the action represents the user's answer to a real person, carries social weight, and must not be performed without explicit user confirmation. It also discloses that acceptance has no scheduling side effect. These are meaningful behavioral warnings not present in annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Three dense sentences, each earning its place: what the tool does, where the id comes from, and the critical safety caveat. The procedural front-loading makes the important confirmation requirement immediately visible.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a two-parameter mutation tool with no output schema, the description covers the prerequisite, the required user confirmation, and the post-call limitation about scheduling. An agent has enough context to invoke it correctly and to explain the outcome to the user.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so baseline is 3. The description adds value by emphasizing that bookingId comes from my_bookings and that 'answer' is the user's decision rather than the agent's judgment, reinforcing the enum with important pragmatic context.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb and resource: 'Answer one booking request sent to the signed-in user.' It also makes the accept/decline role clear and distinguishes itself from siblings by scoping to booking requests and pointing to my_bookings for the id.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

It gives explicit workflow: get the id from my_bookings first, read the request back to the user, and obtain a clear yes before calling. It also states a key limitation—accepting does not arrange a time—so the agent knows not to treat this tool as an appointment scheduler.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.